Vibration motor

Abstract

A vibration motor is disclosed. The vibration motor includes a housing; an elastic connecting piece; a fixed component; a vibrating component comprising a counterweight suspended in the housing by the elastic connecting piece; and a damping piece accommodated in the housing and fixed on the counterweight. One of the fixed component and the vibrating component includes coils, and the other includes a magnet. The counterweight includes a restricting protrusion extending from a side facing the elastic connecting piece for abutting against and restricting the damping piece.

What is claimed is: 
     
       1. A vibration motor comprising:
 a housing; 
 an elastic connecting piece; 
 a vibrating component, the vibrating component comprises a counterweight suspended in the housing by the elastic connecting piece; 
 a fixed component, the fixed component includes coils while the vibrating component includes a magnet, or the fixed component includes a magnet while the vibrating component includes coils; 
 a damping piece, the damping piece is directly fixed on a side of the counterweight and can be subjected to elastic deformation along the vibrating direction of the vibrating component; 
 wherein 
 the counterweight includes a restricting protrusion extending from the side of the counterweight for abutting against and restricting the damping piece. 
 
     
     
       2. The vibration motor as described in  claim 1 , wherein the damping piece and the counterweight are complementary to each other. 
     
     
       3. The vibration motor as described in  claim 2 , wherein the damping piece comprises an insertion part, and the side of the counterweight is provided with a slot matching with the insertion part; the restricting protrusion comprises a main body part abutting against the side of the counterweight and a projecting part matching with the slot. 
     
     
       4. The vibration motor as described in  claim 3 , wherein the housing comprises a cover plate; the fixed component is fixed on the cover plate; a bearing surface is formed on a surface of the restricting protrusion facing the cover plate, and matches with a contact surface on the damping piece correspondingly. 
     
     
       5. The vibration motor as described in  claim 4 , wherein the vibrating component comprises a magnet and a pole plate; the magnet is accommodated in the counterweight; and the pole plate is adhered to an end surface on the counterweight far from the cover plate. 
     
     
       6. The vibration motor as described in  claim 2 , wherein the counterweight comprises an insertion part formed in the way of extending on the side of the counterweight, and the damping piece is provided with a slot matching the insertion part; the restricting protrusion has a bearing surface to which the insertion part is adhered. 
     
     
       7. The vibration motor as described in  claim 1 , wherein the side of the counterweight is a plane; the restricting protrusion comprises a main body part abutting against the side of the counterweight; and an adhesive layer is also arranged between the damping piece and the main body part. 
     
     
       8. The vibration motor as described in  claim 7 , wherein the adhesive layer is a layer of double-faced adhesive tape, or a layer of resin glue or gum. 
     
     
       9. The vibration motor as described in  claim 2 , wherein two restricting protrusions are arranged on the side of the counterweight at interval along a direction vertical to a vibrating direction of the vibration motor.